Nobody played Rayman 2 and Driver?

Funny that I just thought of Rayman 2 when I saw your post. It is definitely one of my favorite all-time games. I am not sure if I had played the native PC version or the emulated Dreamcast version more... Played a bit of Rayman Revolution as well. But never, not once, played the Playstation 1 version.

Total Annihilation
Age of Empires (1 and 2)
SimCity 2000

Despite not having any kind of modding tools or editor, I still like playing through Gunmetal because the maps are quite nice visually despite the game being stuck in 256 colours land. (in 1998 no less!)

The soundtrack is great too.

Diablo I
Sims
Mechwarrior II
Mechwarrior III
Mechwarrior IV
Freelancer
C&C 1 and RA
Edit: UT99 campaign modes also.

Heroes 3 and Civilization are the best 😀 endless hours of gameplay..

Red alert 2
Stratosphere
Sim city 2000

All of the LucasArts Star Wars games. Jedi Knight/Mysteries Of The Sith on a 98/ME system with Aureal 3D hardware and good headphones is a must-have experience.

empire earth
various C&C series rts games
UT

and more, but those three are probably the most regular revisits

So many games but these are my top favorites.

Sim Tower
Streets of Sim City
SimCity 2000
Sim City 3000
Sim City
Quake 3
Age of empires 1 with expansion
Age of empires 2 with expansion
Sim park
Sim Safari
Stratosphere
Hired team trial gold
Half life
StarCraft with broodwar expansion

Sim Tower #1

my list of "must install if the hardware can handle it" games:

C&C 1+2
Red Alert 1+2
Quake, Quake 2, Quake 3 Arena
UT
NFS hot pursuit, road challenge/high stakes, porsche unleashed
Moto Racer
Redline Racer
Max Payne
Half-Life
Forsaken
Tony Hawk Pro Skater 2